At this point, it’s almost easy to forget that before Transmission, SRAM had a full line of Eagle drivetrains spanning from entry-level SX to the top-end XX1 AXS. And up until now, SRAM still had nine different non-Transmission product lines that likely aren’t getting the attention that they used to.
In that way, it makes sense that they’ve introduced a new Eagle S-Series to consolidate the company’s decade-old Eagle mountain bike drivetrain technology into a simplified three-tier system. The new lineup replaces multiple existing Eagle product lines with the S100, S200, and S500 models, designed to streamline component selection and compatibility across mountain bike, e-mountain bike, and gravel bike applications.
The S500 Eagle AXS represents the top tier, featuring wireless electronic shifting technology and premium materials with compatibility across AXS controllers, including drop-bar shifters for gravel bikes.
The mid-level S200 Eagle targets riders seeking mechanical shifting with competitive weight specifications, while the entry-level S100 Eagle focuses on durability and value with enhanced e-MTB compatibility. All three systems maintain Eagle’s 10-52 tooth cassette range and a 1×12 single-chainring design.
SRAM has introduced a replacement matrix system to help users identify compatible upgrades from older Eagle components to the new S-Series. All existing Eagle 12 speed components should be compatible, as long as you use AXS components for AXS groups, etc. But there are also three new chains, three new cassettes, three new derailleurs, and two new shifters to choos from – there is no new AXS shifter, just use the existing shift switches. There are also five new cranksets including models with both Powerspline and DUB spindles.
The S100 model also includes a UDH Half Mount design intended to provide additional impact resistance. Half mount seems to be a simple plate that goes over the end of the derailleur bolt, and attaches with the UDH Full Mount bolt. It’s not clear why the Half Mount is only listed as part of the S100 model, though.
With affordable pricing for S100 and S200, riders with existing SRAM Eagle groups will be happy to hear that replacement parts will continue to be available without forcing you to upgrade to Transmission.
sram.com
